It is a congruent number.
It is an unprimeable number.
Almost surely, 2142489920 is an apocalyptic number.
142489920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 142489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239536224).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
142489920 is a wasteful number, since it uses less digits than its factorization.
142489920 is an evil number, because the sum of its binary digits is even.
The square root of 142489920 is about 11936.9141741071. The cubic root of 142489920 is about 522.3096473187.
The spelling of 142489920 in words is "one hundred forty-two million, four hundred eighty-nine thousand, nine hundred twenty".